Rail-bond for electric railways



Patented lune l3, I899.

F. u. DANIELS. BAIL BOND FOB ELECTRIC BAILWAYS.

(Application filed Apr. 25, 1899.)

(No Model.)

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rn'snn. DANIELS, OF WORCESTER;MASSACHUSETTS.

RAIL-BOND FOR ELECTR EC RA BLWAYS.

SPECIFICATION forming part of Letters Patent No. 626,980, dated June 13,189.9.

- Application filed April 251 1899' To (all whom. it may concerh:

Ee'it known that I, FRED II. DANIELS, a citizen of the United States,and a resident of \Vorcester, in the county of Worcester and State ofMassachusetts, have invented a certain new and 'useful Improvement inthe Manufacture of Rail-Bonds for Electric Railways and other Purposes,of which the following is a specification.

My invention has reference to a rail-bond designed more particularly foruse as a connection between the terminals of the two adjoining rails ofan electric railway, and consisting of strands of copper wire twistedtogether in the flattened copper-wire rope or ca- .ble, as shown, forexample, in Figure .2 of the drawings of my Patent No.;582,'849, of May18, 1897. Iii-making such bonds it has been found when the ropeor cableis flattened that the wires of which it 'iscomposed are bruiseda'nd'indented one into theother, and in some instances nearly or quitecut through by the pressure requisite t'o fiatten'the rope, while theconducting power of the bond as a whole is materially impaired. I "havediscovered that thisdefect can be obviated entirely by omitting from theinterior of the cable several of the strands, dependingin number uponthe cross-section of the cable and the number of strands of wirecomposing it, the cable in' effect being tubular or pipe-like instead ofsolid throughout, 'as heretofore has been the When this tubular orpipe-like cable is flatt 'ned, the wire strandsunder the'pressure towhich they are subjected have the opportunity, owing to the spaceafforded for this purpose by the tubular structune of the un- Iflattened cablato adjust themselves to their new position and in theirnew relations without any injury tothemselves or without cutting orbruising one another, the resulting product being in this respectnoticeably different from the flattened bond made from orserum, 714,395.(Nomodel) dinary copper-wire cable, and, moreover, be-

ingmuch more flexible and satisfactory in every way than the latter.

In the accompanying drawings, Fig. 1 is a view of a section of the.tubular or pipe-like copper-wire cable or rope from which the con--necto'r or bond is to be made.

Fig.2 is a cross-section of the same.

Fig. 3 is a view of the bond after it has been flattened out betweenitsends. the samethrough the flattened part.

'7 The copper-wire rope or cable is shown at A, Fig. 1.. The differencebetween it and the ordinary copper-wire rope is that several of.the-central or core wiresin thisinstance sev en-.-are omitted, thusgiving to the rope a tubular or pipe-like structure. lhis tubularrope-is shown in Fig. 2 as flattened, with the exception of its ends.

Fig. 4; is a cross-section of v Till-BBB ends themselves can be securedor welded by pressure to suitaforesaidpatent, No. 582,849.

Having described my improvement, what I claim, and, desire to secure byLetters Pat-- out, is-.-

1. The improvement in the manufacture of rail bonds or connectors forelectric railways which consists in forming from strands of copper wirea tubular rope or cable, and then flattening said rope or cable bypressure, sub- .stautially as andfor the purposes hereinbe- ,foresetforth.

2. As animproved article otmanufacture,- a rail-bond made from tubularflattened copper-wire rope or cable, as hereirnbefore set forth.

:In testimony whereof I havehereunto set 80 my hand his 21st day ofApril, 1899.

- FRED II. DANIELS;

\Vitnesses:

N. G. STODDARD, Gnn'rnunn' LAMPSON.

able-terminals in the manner set forth in my

